# GPT-5.4 nano vs Qwen3.5 Flash

> Side-by-side benchmark comparison for GPT-5.4 nano and Qwen3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-nano-vs-qwen3-5-flash
- Last updated: September 27, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick GPT-5.4 nano if you want the stronger benchmark profile. Qwen3.5 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.4 nano leads overall 50.81 to 45.49.
- The clearest category separation is in mathematics, where the averages are 43.8 for GPT-5.4 nano and 28.4 for Qwen3.5 Flash.
- The biggest single benchmark swing is FrontierMath v2 (Tiers 1-3) in Mathematics, with scores of 25.860% and 6.207%.
- Qwen3.5 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.5 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | GPT-5.4 nano | Qwen3.5 Flash |
|----------|----------|----------|
| Creator | OpenAI | Alibaba |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Overall Score | 50.81 | 45.49 |
| Benchmarks Covered | 20 | 6 |
| Pricing (input/output) | $0.20 / $1.25 | $0.10 / $0.40 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 31.7 (Supported · #64/105)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | GPT-5.4 nano | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 46.3% | Coming soon | Coming soon |
| OSWorld-Verified | 39% | Coming soon | Coming soon |
| MCP Atlas | 56.1% | Coming soon | Coming soon |
| Toolathlon | 35.5% | Coming soon | Coming soon |
| τ²-bench results | 92.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 41.6% | Coming soon | Coming soon |

### Coding

- Winner: Directional only
- GPT-5.4 nano public-lane score: 31.6 (Supported · #84/135)
- Qwen3.5 Flash public-lane score: 26.5 (Estimated · #97/135)

| Benchmark | GPT-5.4 nano | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 26.10% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.0% | 83.3% | GPT-5.4 nano |
| SWE-bench (Vals) | 69.8% | 64.4% | GPT-5.4 nano |

### Reasoning

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 36.9 (Unranked · 4 rankable rows)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | GPT-5.4 nano | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 51.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 5.7% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 23.8 (#47/50)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | GPT-5.4 nano | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 66.1% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 69.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- GPT-5.4 nano public-lane score: 37.8 (Supported · #97/158)
- Qwen3.5 Flash public-lane score: 43 (Estimated · #80/158)

| Benchmark | GPT-5.4 nano | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 82.8% | Coming soon | Coming soon |
| HLE | 37.7% | Coming soon | Coming soon |
| HLE w/o tools | 24.3% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 77.5% | 82.8% | Qwen3.5 Flash |
| MMLU-Pro (Vals) | 77.2% | 84.1% | Qwen3.5 Flash |

### Instruction Following

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 91.9 (#9/124)
- Qwen3.5 Flash public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 43.8 (Unranked · 2 rankable rows)
- Qwen3.5 Flash public-lane score: 28.4 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.4 nano | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 25.860% | 6.207% | GPT-5.4 nano |
| FrontierMath v2 (Tier 4) | 6.250% | 0.000% | GPT-5.4 nano |

## FAQ

### Which is better overall, GPT-5.4 nano or Qwen3.5 Flash?

GPT-5.4 nano is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 nano and Qwen3.5 Flash?

The widest category gap is in mathematics, where the averages are 43.8 for GPT-5.4 nano and 28.4 for Qwen3.5 Flash.

### How many benchmarks does GPT-5.4 nano cover on BenchLM?

GPT-5.4 nano currently has 20 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.5 Flash cover on BenchLM?

Qwen3.5 Flash currently has 6 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.4 nano vs GPT-5.4 Pro](/compare/gpt-5-4-nano-vs-gpt-5-4-pro)
- [Qwen3.5 Flash vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-qwen3-5-flash)
- [GPT-5.4 nano vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-nano)
- [Qwen3.5 Flash vs GPT-5.4](/compare/gpt-5-4-vs-qwen3-5-flash)

## Explore More

- [GPT-5.4 nano profile](/models/gpt-5-4-nano)
- [Qwen3.5 Flash profile](/models/qwen3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)